Over the holidays a PSA was released describing an Arbitrary PHP code execution vulnerability in the PHPmailer library. This is a very popular PHP library used on many Drupal sites so make sure you review this advisory.
"There is now a new experimental subsystem in core called Layout, in the namespace \Drupal\Core\Layout. This is adapted from the contrib module Layout Plugin, used primarily by Panels and Display Suite."
"The TWG coding standards committee is announcing three coding standards changes for final discussion. These appear to have reached a point close enough to consensus for final completion."